Document mpX83vVGKzYK8vZa7mee0oxQB

184 CHAPTER 9 1950 Guide )Table 5. Coefficients of Transmission (U of Frame Walls Coefficients are expressed in Btu per {hour) (square foot) (Fahrenheit degree difference in temperature between the air on the two tides), and are based on an outside wind velocity of IS mpk. No Insulation Between Studs* (See Table .6) EXTERIOR FINISH INTERIOR FINISH TYPE OF SHEATHING GYP8UM Win THICK) Pit- wood (ill rathick) Wood/ (Him. THICK) Bums. Paper ATING Board (Him. THICK) A BCD ea is Wood Siding (Clapboard) j*H4TfUUG Metal Lath and Plaster* ................................... 0.33 022 036 030 Gypsum Board 04 in.) DecoratedTM. 0.32 022 036 0.20 Wood Lath and Piaster..............,....................... 0.31 021 035 0.19 Gypsum Lath 04 in.) Plastered6_________ -- 0.31 020 035 0.19 Plywood 04 in.) Plain or Decorated_________,, 0.30 020 0.24 0.19 Insulating Board 04 in.) Plain or Decorated-.. 0.23 0.23 0.19 0.16 Insulating Board Lath 04 in.) Plastered*____ k 0.22 0.22 0.19 0.15 Insulating Board Lath (1 in.) Plastered*--------- 0.17 0.17 035 0.12 1 2 3 4 S 6 7 8 Wood* Shingles Metal Lath and Plaster*...... ............... 0.25 0.25 0.21 037 9 Gypsum Board 04 in.) Decorated.........,,........ 0.25 0.25 0.21 0.17 10 Wood Lath and Piaster--.................. ......... -- 0.24 0.24 0.20 0.16 11 Gypsum Lath 04 in.) Plastered*-----,.............. 0.24 0.24 0.20 0.16 12 Plywood 04 in.) Plain or Decorated,............ 0.24 0.24 0.20 0.16 13 Insulating Board 04 in.) Plain or Perorated 0.19 0.19 0.17 . 0.14 14 Insulating Board Lath 04 in.) Plastered*-- 0.19 0.18 0.17 0.13 15 Insulating Board Lath (1 in.) Plastered*______ 0.14 0.14 0.13 0.11 16 Stucco Metal Lath and Plaster*..... .................. ............ 0.43 0.42 032 033 17 Gypsum Board 04 in.) Decorated..--________ 0.42 0.41 031 033 18 Wood Lath and Plaster 0.40 0.39 030 032 19 Gypsum Lath 04 in.) Plastered*......... 0.39 0.39 030 0.22 20 Plywood 04 in.) Plain or Decorated__ --___ 0.39 038 039 032 21 Insulating Board 04 in.) Plain or Decorated..., 0.27 0.27 032 0.18 22 Insulating Board Lath 04 in.) Plastered*_____ 0.26 0.20 032 0.17 23 Insulating Board lath (1 in.) Plastered*......... 0.19 0.19 0.16 0.14 24 Bates Veneer* Metal Lath and Plaster* ............v..... 0.37 0.35 038 031 25 Gypsum Board 04 in.) Decorated--. 0.36 036 038 031 28 Wood Lath and Piaster................................. 0.35 034 037 030 27 Gypsum Lath 04 in.) Plastered*---------- 024 034 037 0.20 28 Plywood 04 in.) Plain or Decorated__ .______ 024 033 037 030 29 Insulating Board 04 in.) Plain or Decorated_ 022 0.25 031 0.17 30 Insulating Board Lath 04 in.) Plastered*-- 024 034 030 0.16 31 Insulating Board Lath (1 in.) Plastered*--.__ 0.18 0.18 0.15 0.13 32 Coefficients not weighted; effect of studding neglected. 6 Plaster assumed } in. thick. * Plaster assumed } in. thick. d Furring strips (1 in. nominal thickness) between wood shingles and all sheathings except wood. Small air space and mortar between building paper and brick veneer neglected. J Nominal thickness, 1 in. Heat Transmission Coefficients of Building Materials 185 Table 6. Coefficients of Transmission (7) of Frame Walls with Insulation Between Framing"- 6 roefRcients are expressed in Btu per (hour) (square foot) (Fahrenheit degree difference in temperature between " the air on the two sides), and are based on an outside wind velocity of 16 mph. COEFFICIENT WITH INSULATION BETWEEN FRAMING COEFFICIENT WITH NO insulation BETWEEN FRAMING Mineral Wool ob Vegetable Fibers in Blanket or Bat Form* (Thickness below) 1 m. 2 IN. 3 m. Mineral Wool _ AB cD ts i 0.11 0.078 0.12 0.083 0.13 0.088 0.14 0.092 0.15 0.097 0.063 0.067 0.070 0.072 0.075 . 0.054 0.056 0.058 0.061 0362 0.051 0353 0.055 0.057 0.059 33 34 35 38 37 0.16 0.10 0.17 0.10 0.18 0.11 0.19 0.11 0.20 0.12 0X178 0.080 0.082 0.0S4 0.086 0.064 0.066 0.067 0.069 0370 0.060 0362 0363 0365 0.066 38 39 40 41 42 031 0.12 032 0.12 033 0.12 034 0J2 035 0.13 0.088 0.089 0.091 0.093 0.094 0.072 0.073 0.074 0375 0.076 0367 0.0G8 0369 0.070 0371 43 44 45 46 47 036 0.13 037 0.14 038 0.14 039 0.14 030 0.14 0.096 0.097 0o..0io98 0.10 0377 0.078 0379 0.080 0.080 0.072 0373 0.073 0.075 0375 48 49 50 51 52 031 0.14 032 0.15 033 0.15 034 0.15 035 0.15 0.10 0.10 0.10 0.10 0.11 0.081 0382 0.083 0.083 0384 0.076 0377 0.077 0378 0.078 53 54 55 56 , 57 036 0.15 0.11 037 0.16 0.11 038 0.16 0.11 039 0.16 . 0.11 0.40 0.16 0.11 0.085 0.085 0386 0.086 0387 0.079 0.080 0.0S0 0381 0383 58 59 60 61 62 0.41 0.16 0.42 0.16 0.43 0.17 0.44 0.17 0.11 0.11 0.11 0.11 0387 0.088 0.088 0.0S9 0.082 0.082 .0.082 0.083 63 64 65 66 This table may be used for determining the coefficients of transmission of frame constructions with the types and thicknesses of, insulation indicated in Columns A to D inclusive between framing. Columns A, ti and C may be used for walls, ceilings or roofs with only one air space between framing but are not applicable to ceilings with no flooring above. (See Table 11.) Column D is applicable to walls only. il' the coefficient of transmission of a frame wall consisting of wood siding, Jj in. insulating p0TM sheathing, studs, gypsum lath and plaster, with 2 in. blanket insulation between studs. According w 1 able 5, a wall of this construction with no insulation between studs has a coefficient of 0.19 (Wall No.'4D). Referring to Column B above, it will be found that a wall of this value with 2 in. blanket insulation between the studs has a coefficient of 0.084. Coefficients corrected for 2x4 framing, 16 in. on centers--15 per cent of surface area, * Based on one air space between framing. 4 No air space.